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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_regex.ref.error_type"></a><a class="link" href="error_type.html" title="error_type">error_type</a>
</h3></div></div></div>
<h5>
<a name="boost_regex.ref.error_type.h0"></a>
        <span class="phrase"><a name="boost_regex.ref.error_type.synopsis"></a></span><a class="link" href="error_type.html#boost_regex.ref.error_type.synopsis">Synopsis</a>
      </h5>
<p>
        Type error type represents the different types of errors that can be raised
        by the library when parsing a regular expression.
      </p>
<pre class="programlisting"><span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">{</span> <span class="keyword">namespace</span> <span class="identifier">regex_constants</span><span class="special">{</span>

<span class="keyword">typedef</span> <span class="identifier">implementation</span><span class="special">-</span><span class="identifier">specific</span><span class="special">-</span><span class="identifier">type</span> <span class="identifier">error_type</span><span class="special">;</span>

<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_collate</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_ctype</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_escape</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_backref</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_brack</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_paren</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_brace</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_badbrace</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_range</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_space</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_badrepeat</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_complexity</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_stack</span><span class="special">;</span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="identifier">error_type</span> <span class="identifier">error_bad_pattern</span><span class="special">;</span>

<span class="special">}</span> <span class="comment">// namespace regex_constants</span>
<span class="special">}</span> <span class="comment">// namespace boost</span>
</pre>
<h5>
<a name="boost_regex.ref.error_type.h1"></a>
        <span class="phrase"><a name="boost_regex.ref.error_type.description"></a></span><a class="link" href="error_type.html#boost_regex.ref.error_type.description">Description</a>
      </h5>
<p>
        The type <code class="computeroutput"><span class="identifier">error_type</span></code> is an
        implementation-specific enumeration type that may take one of the following
        values:
      </p>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  Constant
                </p>
              </th>
<th>
                <p>
                  Meaning
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  error_collate
                </p>
              </td>
<td>
                <p>
                  An invalid collating element was specified in a [[.name.]] block.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_ctype
                </p>
              </td>
<td>
                <p>
                  An invalid character class name was specified in a [[:name:]] block.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_escape
                </p>
              </td>
<td>
                <p>
                  An invalid or trailing escape was encountered.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_backref
                </p>
              </td>
<td>
                <p>
                  A back-reference to a non-existant marked sub-expression was encountered.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_brack
                </p>
              </td>
<td>
                <p>
                  An invalid character set [...] was encountered.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_paren
                </p>
              </td>
<td>
                <p>
                  Mismatched '(' and ')'.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_brace
                </p>
              </td>
<td>
                <p>
                  Mismatched '{' and '}'.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_badbrace
                </p>
              </td>
<td>
                <p>
                  Invalid contents of a {...} block.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_range
                </p>
              </td>
<td>
                <p>
                  A character range was invalid, for example [d-a].
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_space
                </p>
              </td>
<td>
                <p>
                  Out of memory.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_badrepeat
                </p>
              </td>
<td>
                <p>
                  An attempt to repeat something that can not be repeated - for example
                  a*+
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_complexity
                </p>
              </td>
<td>
                <p>
                  The expression became too complex to handle.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_stack
                </p>
              </td>
<td>
                <p>
                  Out of program stack space.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  error_bad_pattern
                </p>
              </td>
<td>
                <p>
                  Other unspecified errors.
                </p>
              </td>
</tr>
</tbody>
</table></div>
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<td align="right"><div class="copyright-footer">Copyright © 1998-2013 John Maddock<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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